That set a record for the fastest offensive lineman time in NFL scouting combine history, breaking the mark previously held by Allen Barbre with a 4.84 in 2007. Barbre never became a top-flight blocker in the NFL, though.

Armstead, who doubles as a shot putter for his college, isn't one of the top-ranked offensive tackles, ranking well below Texas A&M's Luke Joeckel, Central Michigan's Eric Fisher and Oklahoma's Lane Johnson, but is regarded as a rising player.

He played in the Senior Bowl and East-West Shrine all-star games.

And his time may embarrass a few skill players incapable of matching that display of speed.

Meanwhile, North Carolina offensive guard Jonathan Cooper, who's one of the best players in the draft and projected to go high in the first round, ran a respectable 5.13 40-yard dash.

Another good time by a good player: a 5.06 for Fisher.

Alabama offensive tackle D.J. Fluker, who said he has a meeting with the Ravens here at the combine, ran a 5.32 after getting down to 339 pounds from 355 pounds at the Senior Bowl.

Fluker is an old-school rough, tough blocker who says he loves to embarrass defensive linemen and tells them, "I'm going to take your lunch money."